STMicroelectronics STM8S003F3P6

Overview

STM8S003F3P6 from STMicroelectronics is an 8-bit value-line microcontroller featuring a 16 MHz STM8 core, 8 Kbyte Flash memory, 128-byte data EEPROM, 10-bit ADC with 5 channels, three timers (including advanced control timer TIM1), and UART/SPI/I²C interfaces. It targets cost-sensitive embedded control applications such as motor drive supervision, LED lighting controllers, and appliance power management subsystems.

For engineers reviewing the STM8S003F3P6 datasheet, STM8S003F3P6 pinout, STM8S003F3P6 application, or STM8S003F3P6 equivalent, this page delivers verified technical context, package-specific pin functions, real-world use scenarios, and validated alternative options for industrial and consumer BOM optimization.

Technical Context

The STM8S003F3P6 implements a Harvard-architecture STM8 core with 3-stage pipeline and extended instruction set, enabling deterministic 16 MHz operation across 2.95–5.5 V supply. Its clock system integrates four sources: external crystal, external clock input, user-trimmable 16 MHz RC, and low-power 128 kHz RC - all monitored by a clock security system.

Interrupt handling uses a nested controller supporting 32 vectors and up to 27 external interrupts on six priority levels. Memory subsystem includes 1 Kbyte RAM, 8 Kbyte Flash with 20-year data retention at 55 °C, and 128-byte true EEPROM rated for 100 k write/erase cycles - all accessible via SWIM single-wire interface for programming and debugging.

Key Specifications

Pinout & Package

TSSOP20 (6.5 × 4.4 mm, 0.65 mm pitch) package with 20 leads; pinout optimized for compact board layout and cost-sensitive applications requiring minimal external components.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with STM8S003F3P6, STM8S005C6T6 offers scalable memory within identical tooling and pinout, while EFM8BB10F8G-A-QFN20 trades SWIM simplicity for higher-resolution analog and dual-serial flexibility - both require validation against timing-critical ISR latency and EEPROM wear-leveling requirements.

Availability

STM8S003F3P6 is available at Aetrix Electronics and suitable for LED lighting controllers, appliance power supervision, and small motor drive interfaces requiring stable component supply and long-term manufacturability.

Supply support for STM8S003F3P6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STM8S value line targets cost-optimized embedded control applications, emphasizing low-voltage operation, integrated peripherals, and robustness in harsh environments - specifically engineered for appliance, lighting, and industrial subsystems.

FAQ

Does STM8S003F3P6 support in-application programming (IAP) of Flash memory?

Yes. The device supports IAP via its embedded bootloader and SWIM interface. Users can reprogram Flash sectors during runtime using the FLASH_DUKR key sequence and dedicated command register (FLASH_CR2), enabling field firmware updates without external programmers. This requires careful sector locking/unlocking and interrupt masking during write operations.

What is the maximum ADC sampling rate achievable with STM8S003F3P6?

The ADC achieves up to 1 MSPS conversion rate when configured in continuous scan mode with 10-bit resolution and no analog watchdog enabled. Actual throughput depends on prescaler settings and channel count; for 5-channel scan, typical effective rate is ~200 kSPS with 1.5 µs conversion time per sample per datasheet Table 45.

Can TIM1 complementary outputs drive a 3-phase inverter directly?

No. TIM1 provides three complementary outputs with programmable dead-time insertion, but lacks built-in 3-phase center-aligned PWM or break-input logic required for full 3-phase inverter control. It supports two-leg half-bridge drivers (e.g., for BLDC commutation) with external gate drivers - third leg must be managed via software-timed GPIO or additional timer resources.

Is the internal 16 MHz RC oscillator accurate enough for UART communication at 115.2 kbps?

Yes, when trimmed. The factory-trimmed HSI RC oscillator achieves ±1% accuracy across voltage and temperature; after user trimming (via CLK_HSITRIMR register), it reaches ±0.5% - sufficient for error-free UART operation at 115.2 kbps with standard 16× oversampling, as confirmed in ST application note AN2606.